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Finding the Fourth Proportional to 386,673.49, 579,871.82 and 133,886.12

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Solution

The fourth proportional to 386,673.49, 579,871.82 and 133,886.12 is: 200,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,673.49 : 579,871.82 = 133,886.12 : x
  2. Step 2: Convert to fraction form
    386,673.49/579,871.82 = 133,886.12/x
  3. Step 3: Cross multiply
    386,673.49x = 579,871.82 × 133,886.12
  4. Step 4: Simplify right side
    386,673.49x = 77,636,789,861.53
  5. Step 5: Solve for x
    x = 77,636,789,861.53/386,673.49
  6. Step 6: Final answer
    x = 200,781.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.